ospf6d/ospf6_zebra.c

   1 /*
   2  * Copyright (C) 2003 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <zebra.h>
  22
  23 #include "log.h"
  24 #include "vty.h"
  25 #include "command.h"
  26 #include "prefix.h"
  27 #include "stream.h"
  28 #include "zclient.h"
  29 #include "memory.h"
  30 #include "lib/bfd.h"
  31 #include "lib_errors.h"
  32
  33 #include "ospf6_proto.h"
  34 #include "ospf6_top.h"
  35 #include "ospf6_interface.h"
  36 #include "ospf6_route.h"
  37 #include "ospf6_lsa.h"
  38 #include "ospf6_lsdb.h"
  39 #include "ospf6_asbr.h"
  40 #include "ospf6_zebra.h"
  41 #include "ospf6d.h"
  42
  43 DEFINE_MTYPE_STATIC(OSPF6D, OSPF6_DISTANCE, "OSPF6 distance")
  44
  45 unsigned char conf_debug_ospf6_zebra = 0;
  46
  47 /* information about zebra. */
  48 struct zclient *zclient = NULL;
  49
  50 /* Router-id update message from zebra. */
  51 static int ospf6_router_id_update_zebra(int command, struct zclient *zclient,
  52                                         zebra_size_t length, vrf_id_t vrf_id)
  53 {
  54         struct prefix router_id;
  55         struct ospf6 *o = ospf6;
  56
  57         zebra_router_id_update_read(zclient->ibuf, &router_id);
  58
  59         om6->zebra_router_id = router_id.u.prefix4.s_addr;
  60
  61         if (o == NULL)
  62                 return 0;
  63
  64         o->router_id_zebra = router_id.u.prefix4;
  65         if (IS_OSPF6_DEBUG_ZEBRA(RECV)) {
  66                 char buf[INET_ADDRSTRLEN];
  67
  68                 zlog_debug("%s: zebra router-id %s update",
  69                            __PRETTY_FUNCTION__,
  70                            inet_ntop(AF_INET, &router_id.u.prefix4,
  71                                      buf, INET_ADDRSTRLEN));
  72         }
  73
  74         ospf6_router_id_update();
  75
  76         return 0;
  77 }
  78
  79 /* redistribute function */
  80 void ospf6_zebra_redistribute(int type)
  81 {
  82         if (vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT))
  83                 return;
  84         vrf_bitmap_set(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
  85
  86         if (zclient->sock > 0)
  87                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient,
  88                                         AFI_IP6, type, 0, VRF_DEFAULT);
  89 }
  90
  91 void ospf6_zebra_no_redistribute(int type)
  92 {
  93         if (!vrf_bitmap_check(zclient->redist[AFI_IP6][type], VRF_DEFAULT))
  94                 return;
  95         vrf_bitmap_unset(zclient->redist[AFI_IP6][type], VRF_DEFAULT);
  96         if (zclient->sock > 0)
  97                 zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient,
  98                                         AFI_IP6, type, 0, VRF_DEFAULT);
  99 }
 100
 101 /* Inteface addition message from zebra. */
 102 static int ospf6_zebra_if_add(int command, struct zclient *zclient,
 103                               zebra_size_t length, vrf_id_t vrf_id)
 104 {
 105         struct interface *ifp;
 106
 107         ifp = zebra_interface_add_read(zclient->ibuf, vrf_id);
 108         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 109                 zlog_debug("Zebra Interface add: %s index %d mtu %d", ifp->name,
 110                            ifp->ifindex, ifp->mtu6);
 111         ospf6_interface_if_add(ifp);
 112         return 0;
 113 }
 114
 115 static int ospf6_zebra_if_del(int command, struct zclient *zclient,
 116                               zebra_size_t length, vrf_id_t vrf_id)
 117 {
 118         struct interface *ifp;
 119
 120         if (!(ifp = zebra_interface_state_read(zclient->ibuf, vrf_id)))
 121                 return 0;
 122
 123         if (if_is_up(ifp))
 124                 zlog_warn("Zebra: got delete of %s, but interface is still up",
 125                           ifp->name);
 126
 127         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 128                 zlog_debug("Zebra Interface delete: %s index %d mtu %d",
 129                            ifp->name, ifp->ifindex, ifp->mtu6);
 130
 131         if_set_index(ifp, IFINDEX_INTERNAL);
 132         return 0;
 133 }
 134
 135 static int ospf6_zebra_if_state_update(int command, struct zclient *zclient,
 136                                        zebra_size_t length, vrf_id_t vrf_id)
 137 {
 138         struct interface *ifp;
 139
 140         ifp = zebra_interface_state_read(zclient->ibuf, vrf_id);
 141         if (ifp == NULL)
 142                 return 0;
 143
 144         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 145                 zlog_debug(
 146                         "Zebra Interface state change: "
 147                         "%s index %d flags %llx metric %d mtu %d bandwidth %d",
 148                         ifp->name, ifp->ifindex, (unsigned long long)ifp->flags,
 149                         ifp->metric, ifp->mtu6, ifp->bandwidth);
 150
 151         ospf6_interface_state_update(ifp);
 152         return 0;
 153 }
 154
 155 static int ospf6_zebra_if_address_update_add(int command,
 156                                              struct zclient *zclient,
 157                                              zebra_size_t length,
 158                                              vrf_id_t vrf_id)
 159 {
 160         struct connected *c;
 161         char buf[128];
 162
 163         c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD,
 164                                          zclient->ibuf, vrf_id);
 165         if (c == NULL)
 166                 return 0;
 167
 168         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 169                 zlog_debug("Zebra Interface address add: %s %5s %s/%d",
 170                            c->ifp->name, prefix_family_str(c->address),
 171                            inet_ntop(c->address->family, &c->address->u.prefix,
 172                                      buf, sizeof(buf)),
 173                            c->address->prefixlen);
 174
 175         if (c->address->family == AF_INET6) {
 176                 ospf6_interface_state_update(c->ifp);
 177                 ospf6_interface_connected_route_update(c->ifp);
 178         }
 179         return 0;
 180 }
 181
 182 static int ospf6_zebra_if_address_update_delete(int command,
 183                                                 struct zclient *zclient,
 184                                                 zebra_size_t length,
 185                                                 vrf_id_t vrf_id)
 186 {
 187         struct connected *c;
 188         char buf[128];
 189
 190         c = zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE,
 191                                          zclient->ibuf, vrf_id);
 192         if (c == NULL)
 193                 return 0;
 194
 195         if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 196                 zlog_debug("Zebra Interface address delete: %s %5s %s/%d",
 197                            c->ifp->name, prefix_family_str(c->address),
 198                            inet_ntop(c->address->family, &c->address->u.prefix,
 199                                      buf, sizeof(buf)),
 200                            c->address->prefixlen);
 201
 202         if (c->address->family == AF_INET6) {
 203                 ospf6_interface_connected_route_update(c->ifp);
 204                 ospf6_interface_state_update(c->ifp);
 205         }
 206
 207         connected_free(c);
 208
 209         return 0;
 210 }
 211
 212 static int ospf6_zebra_read_route(int command, struct zclient *zclient,
 213                                   zebra_size_t length, vrf_id_t vrf_id)
 214 {
 215         struct zapi_route api;
 216         unsigned long ifindex;
 217         struct in6_addr *nexthop;
 218
 219         if (ospf6 == NULL)
 220                 return 0;
 221
 222         if (zapi_route_decode(zclient->ibuf, &api) < 0)
 223                 return -1;
 224
 225         /* we completely ignore srcdest routes for now. */
 226         if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX))
 227                 return 0;
 228
 229         ifindex = api.nexthops[0].ifindex;
 230         nexthop = &api.nexthops[0].gate.ipv6;
 231
 232         if (IS_OSPF6_DEBUG_ZEBRA(RECV)) {
 233                 char prefixstr[PREFIX2STR_BUFFER], nexthopstr[128];
 234                 prefix2str((struct prefix *)&api.prefix, prefixstr,
 235                            sizeof(prefixstr));
 236                 inet_ntop(AF_INET6, nexthop, nexthopstr, sizeof(nexthopstr));
 237
 238                 zlog_debug(
 239                         "Zebra Receive route %s: %s %s nexthop %s ifindex %ld tag %" ROUTE_TAG_PRI,
 240                         (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD ? "add"
 241                                                                  : "delete"),
 242                         zebra_route_string(api.type), prefixstr, nexthopstr,
 243                         ifindex, api.tag);
 244         }
 245
 246         if (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD)
 247                 ospf6_asbr_redistribute_add(api.type, ifindex, &api.prefix,
 248                                             api.nexthop_num, nexthop, api.tag);
 249         else
 250                 ospf6_asbr_redistribute_remove(api.type, ifindex, &api.prefix);
 251
 252         return 0;
 253 }
 254
 255 DEFUN (show_zebra,
 256        show_ospf6_zebra_cmd,
 257        "show ipv6 ospf6 zebra",
 258        SHOW_STR
 259        IPV6_STR
 260        OSPF6_STR
 261        ZEBRA_STR)
 262 {
 263         int i;
 264         if (zclient == NULL) {
 265                 vty_out(vty, "Not connected to zebra\n");
 266                 return CMD_SUCCESS;
 267         }
 268
 269         vty_out(vty, "Zebra Infomation\n");
 270         vty_out(vty, "  fail: %d\n", zclient->fail);
 271         vty_out(vty, "  redistribute default: %d\n",
 272                 vrf_bitmap_check(zclient->default_information, VRF_DEFAULT));
 273         vty_out(vty, "  redistribute:");
 274         for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
 275                 if (vrf_bitmap_check(zclient->redist[AFI_IP6][i], VRF_DEFAULT))
 276                         vty_out(vty, " %s", zebra_route_string(i));
 277         }
 278         vty_out(vty, "\n");
 279         return CMD_SUCCESS;
 280 }
 281
 282 #define ADD    0
 283 #define REM    1
 284 static void ospf6_zebra_route_update(int type, struct ospf6_route *request)
 285 {
 286         struct zapi_route api;
 287         char buf[PREFIX2STR_BUFFER];
 288         int nhcount;
 289         int ret = 0;
 290         struct prefix *dest;
 291
 292         if (IS_OSPF6_DEBUG_ZEBRA(SEND)) {
 293                 prefix2str(&request->prefix, buf, sizeof(buf));
 294                 zlog_debug("Send %s route: %s",
 295                            (type == REM ? "remove" : "add"), buf);
 296         }
 297
 298         if (zclient->sock < 0) {
 299                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 300                         zlog_debug("  Not connected to Zebra");
 301                 return;
 302         }
 303
 304         if (request->path.origin.adv_router == ospf6->router_id
 305             && (request->path.type == OSPF6_PATH_TYPE_EXTERNAL1
 306                 || request->path.type == OSPF6_PATH_TYPE_EXTERNAL2)) {
 307                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 308                         zlog_debug("  Ignore self-originated external route");
 309                 return;
 310         }
 311
 312         /* If removing is the best path and if there's another path,
 313            treat this request as add the secondary path */
 314         if (type == REM && ospf6_route_is_best(request) && request->next
 315             && ospf6_route_is_same(request, request->next)) {
 316                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 317                         zlog_debug(
 318                                 "  Best-path removal resulted Sencondary addition");
 319                 type = ADD;
 320                 request = request->next;
 321         }
 322
 323         /* Only the best path will be sent to zebra. */
 324         if (!ospf6_route_is_best(request)) {
 325                 /* this is not preferred best route, ignore */
 326                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 327                         zlog_debug("  Ignore non-best route");
 328                 return;
 329         }
 330
 331         nhcount = ospf6_route_num_nexthops(request);
 332         if (nhcount == 0) {
 333                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 334                         zlog_debug("  No nexthop, ignore");
 335                 return;
 336         }
 337
 338         dest = &request->prefix;
 339
 340         memset(&api, 0, sizeof(api));
 341         api.vrf_id = VRF_DEFAULT;
 342         api.type = ZEBRA_ROUTE_OSPF6;
 343         api.safi = SAFI_UNICAST;
 344         api.prefix = *dest;
 345         SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
 346         api.nexthop_num = MIN(nhcount, MULTIPATH_NUM);
 347         ospf6_route_zebra_copy_nexthops(request, api.nexthops, api.nexthop_num);
 348         SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
 349         api.metric = (request->path.metric_type == 2 ? request->path.u.cost_e2
 350                                                      : request->path.cost);
 351         if (request->path.tag) {
 352                 SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
 353                 api.tag = request->path.tag;
 354         }
 355
 356         SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
 357         api.distance =
 358                 ospf6_distance_apply((struct prefix_ipv6 *)dest, request);
 359
 360         if (type == REM)
 361                 ret = zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 362         else
 363                 ret = zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 364
 365         if (ret < 0)
 366                 flog_err(EC_LIB_ZAPI_SOCKET,
 367                          "zclient_route_send() %s failed: %s",
 368                          (type == REM ? "delete" : "add"),
 369                          safe_strerror(errno));
 370
 371         return;
 372 }
 373
 374 void ospf6_zebra_route_update_add(struct ospf6_route *request)
 375 {
 376         ospf6_zebra_route_update(ADD, request);
 377 }
 378
 379 void ospf6_zebra_route_update_remove(struct ospf6_route *request)
 380 {
 381         ospf6_zebra_route_update(REM, request);
 382 }
 383
 384 void ospf6_zebra_add_discard(struct ospf6_route *request)
 385 {
 386         struct zapi_route api;
 387         char buf[INET6_ADDRSTRLEN];
 388         struct prefix *dest = &request->prefix;
 389
 390         if (!CHECK_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED)) {
 391                 memset(&api, 0, sizeof(api));
 392                 api.vrf_id = VRF_DEFAULT;
 393                 api.type = ZEBRA_ROUTE_OSPF6;
 394                 api.safi = SAFI_UNICAST;
 395                 api.prefix = *dest;
 396                 zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 397
 398                 zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
 399
 400                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 401                         zlog_debug("Zebra: Route add discard %s/%d",
 402                                    inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 403                                              INET6_ADDRSTRLEN),
 404                                    dest->prefixlen);
 405
 406                 SET_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED);
 407         } else {
 408                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 409                         zlog_debug(
 410                                 "Zebra: Blackhole route present already %s/%d",
 411                                 inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 412                                           INET6_ADDRSTRLEN),
 413                                 dest->prefixlen);
 414         }
 415 }
 416
 417 void ospf6_zebra_delete_discard(struct ospf6_route *request)
 418 {
 419         struct zapi_route api;
 420         char buf[INET6_ADDRSTRLEN];
 421         struct prefix *dest = &request->prefix;
 422
 423         if (CHECK_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED)) {
 424                 memset(&api, 0, sizeof(api));
 425                 api.vrf_id = VRF_DEFAULT;
 426                 api.type = ZEBRA_ROUTE_OSPF6;
 427                 api.safi = SAFI_UNICAST;
 428                 api.prefix = *dest;
 429                 zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
 430
 431                 zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
 432
 433                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 434                         zlog_debug("Zebra: Route delete discard %s/%d",
 435                                    inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 436                                              INET6_ADDRSTRLEN),
 437                                    dest->prefixlen);
 438
 439                 UNSET_FLAG(request->flag, OSPF6_ROUTE_BLACKHOLE_ADDED);
 440         } else {
 441                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 442                         zlog_debug(
 443                                 "Zebra: Blackhole route already deleted %s/%d",
 444                                 inet_ntop(AF_INET6, &dest->u.prefix6, buf,
 445                                           INET6_ADDRSTRLEN),
 446                                 dest->prefixlen);
 447         }
 448 }
 449
 450 static struct ospf6_distance *ospf6_distance_new(void)
 451 {
 452         return XCALLOC(MTYPE_OSPF6_DISTANCE, sizeof(struct ospf6_distance));
 453 }
 454
 455 static void ospf6_distance_free(struct ospf6_distance *odistance)
 456 {
 457         XFREE(MTYPE_OSPF6_DISTANCE, odistance);
 458 }
 459
 460 int ospf6_distance_set(struct vty *vty, struct ospf6 *o,
 461                        const char *distance_str, const char *ip_str,
 462                        const char *access_list_str)
 463 {
 464         int ret;
 465         struct prefix_ipv6 p;
 466         uint8_t distance;
 467         struct route_node *rn;
 468         struct ospf6_distance *odistance;
 469
 470         ret = str2prefix_ipv6(ip_str, &p);
 471         if (ret == 0) {
 472                 vty_out(vty, "Malformed prefix\n");
 473                 return CMD_WARNING_CONFIG_FAILED;
 474         }
 475
 476         distance = atoi(distance_str);
 477
 478         /* Get OSPF6 distance node. */
 479         rn = route_node_get(o->distance_table, (struct prefix *)&p);
 480         if (rn->info) {
 481                 odistance = rn->info;
 482                 route_unlock_node(rn);
 483         } else {
 484                 odistance = ospf6_distance_new();
 485                 rn->info = odistance;
 486         }
 487
 488         /* Set distance value. */
 489         odistance->distance = distance;
 490
 491         /* Reset access-list configuration. */
 492         if (odistance->access_list) {
 493                 free(odistance->access_list);
 494                 odistance->access_list = NULL;
 495         }
 496         if (access_list_str)
 497                 odistance->access_list = strdup(access_list_str);
 498
 499         return CMD_SUCCESS;
 500 }
 501
 502 int ospf6_distance_unset(struct vty *vty, struct ospf6 *o,
 503                          const char *distance_str, const char *ip_str,
 504                          const char *access_list_str)
 505 {
 506         int ret;
 507         struct prefix_ipv6 p;
 508         struct route_node *rn;
 509         struct ospf6_distance *odistance;
 510
 511         ret = str2prefix_ipv6(ip_str, &p);
 512         if (ret == 0) {
 513                 vty_out(vty, "Malformed prefix\n");
 514                 return CMD_WARNING_CONFIG_FAILED;
 515         }
 516
 517         rn = route_node_lookup(o->distance_table, (struct prefix *)&p);
 518         if (!rn) {
 519                 vty_out(vty, "Cant't find specified prefix\n");
 520                 return CMD_WARNING_CONFIG_FAILED;
 521         }
 522
 523         odistance = rn->info;
 524
 525         if (odistance->access_list)
 526                 free(odistance->access_list);
 527         ospf6_distance_free(odistance);
 528
 529         rn->info = NULL;
 530         route_unlock_node(rn);
 531         route_unlock_node(rn);
 532
 533         return CMD_SUCCESS;
 534 }
 535
 536 void ospf6_distance_reset(struct ospf6 *o)
 537 {
 538         struct route_node *rn;
 539         struct ospf6_distance *odistance;
 540
 541         for (rn = route_top(o->distance_table); rn; rn = route_next(rn))
 542                 if ((odistance = rn->info) != NULL) {
 543                         if (odistance->access_list)
 544                                 free(odistance->access_list);
 545                         ospf6_distance_free(odistance);
 546                         rn->info = NULL;
 547                         route_unlock_node(rn);
 548                 }
 549 }
 550
 551 uint8_t ospf6_distance_apply(struct prefix_ipv6 *p, struct ospf6_route * or)
 552 {
 553         struct ospf6 *o;
 554
 555         o = ospf6;
 556         if (o == NULL)
 557                 return 0;
 558
 559         if (o->distance_intra)
 560                 if (or->path.type == OSPF6_PATH_TYPE_INTRA)
 561                         return o->distance_intra;
 562
 563         if (o->distance_inter)
 564                 if (or->path.type == OSPF6_PATH_TYPE_INTER)
 565                         return o->distance_inter;
 566
 567         if (o->distance_external)
 568                 if (or->path.type == OSPF6_PATH_TYPE_EXTERNAL1 ||
 569                     or->path.type == OSPF6_PATH_TYPE_EXTERNAL2)
 570                         return o->distance_external;
 571
 572         if (o->distance_all)
 573                 return o->distance_all;
 574
 575         return 0;
 576 }
 577
 578 static void ospf6_zebra_connected(struct zclient *zclient)
 579 {
 580         /* Send the client registration */
 581         bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER);
 582
 583         zclient_send_reg_requests(zclient, VRF_DEFAULT);
 584 }
 585
 586 void ospf6_zebra_init(struct thread_master *master)
 587 {
 588         /* Allocate zebra structure. */
 589         zclient = zclient_new(master, &zclient_options_default);
 590         zclient_init(zclient, ZEBRA_ROUTE_OSPF6, 0, &ospf6d_privs);
 591         zclient->zebra_connected = ospf6_zebra_connected;
 592         zclient->router_id_update = ospf6_router_id_update_zebra;
 593         zclient->interface_add = ospf6_zebra_if_add;
 594         zclient->interface_delete = ospf6_zebra_if_del;
 595         zclient->interface_up = ospf6_zebra_if_state_update;
 596         zclient->interface_down = ospf6_zebra_if_state_update;
 597         zclient->interface_address_add = ospf6_zebra_if_address_update_add;
 598         zclient->interface_address_delete =
 599                 ospf6_zebra_if_address_update_delete;
 600         zclient->redistribute_route_add = ospf6_zebra_read_route;
 601         zclient->redistribute_route_del = ospf6_zebra_read_route;
 602
 603         /* Install command element for zebra node. */
 604         install_element(VIEW_NODE, &show_ospf6_zebra_cmd);
 605 }
 606
 607 /* Debug */
 608
 609 DEFUN (debug_ospf6_zebra_sendrecv,
 610        debug_ospf6_zebra_sendrecv_cmd,
 611        "debug ospf6 zebra [<send|recv>]",
 612        DEBUG_STR
 613        OSPF6_STR
 614        "Debug connection between zebra\n"
 615        "Debug Sending zebra\n"
 616        "Debug Receiving zebra\n"
 617       )
 618 {
 619         int idx_send_recv = 3;
 620         unsigned char level = 0;
 621
 622         if (argc == 4) {
 623                 if (strmatch(argv[idx_send_recv]->text, "send"))
 624                         level = OSPF6_DEBUG_ZEBRA_SEND;
 625                 else if (strmatch(argv[idx_send_recv]->text, "recv"))
 626                         level = OSPF6_DEBUG_ZEBRA_RECV;
 627         } else
 628                 level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;
 629
 630         OSPF6_DEBUG_ZEBRA_ON(level);
 631         return CMD_SUCCESS;
 632 }
 633
 634 DEFUN (no_debug_ospf6_zebra_sendrecv,
 635        no_debug_ospf6_zebra_sendrecv_cmd,
 636        "no debug ospf6 zebra [<send|recv>]",
 637        NO_STR
 638        DEBUG_STR
 639        OSPF6_STR
 640        "Debug connection between zebra\n"
 641        "Debug Sending zebra\n"
 642        "Debug Receiving zebra\n"
 643       )
 644 {
 645         int idx_send_recv = 4;
 646         unsigned char level = 0;
 647
 648         if (argc == 5) {
 649                 if (strmatch(argv[idx_send_recv]->text, "send"))
 650                         level = OSPF6_DEBUG_ZEBRA_SEND;
 651                 else if (strmatch(argv[idx_send_recv]->text, "recv"))
 652                         level = OSPF6_DEBUG_ZEBRA_RECV;
 653         } else
 654                 level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;
 655
 656         OSPF6_DEBUG_ZEBRA_OFF(level);
 657         return CMD_SUCCESS;
 658 }
 659
 660
 661 int config_write_ospf6_debug_zebra(struct vty *vty)
 662 {
 663         if (IS_OSPF6_DEBUG_ZEBRA(SEND) && IS_OSPF6_DEBUG_ZEBRA(RECV))
 664                 vty_out(vty, "debug ospf6 zebra\n");
 665         else {
 666                 if (IS_OSPF6_DEBUG_ZEBRA(SEND))
 667                         vty_out(vty, "debug ospf6 zebra send\n");
 668                 if (IS_OSPF6_DEBUG_ZEBRA(RECV))
 669                         vty_out(vty, "debug ospf6 zebra recv\n");
 670         }
 671         return 0;
 672 }
 673
 674 void install_element_ospf6_debug_zebra(void)
 675 {
 676         install_element(ENABLE_NODE, &debug_ospf6_zebra_sendrecv_cmd);
 677         install_element(ENABLE_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
 678         install_element(CONFIG_NODE, &debug_ospf6_zebra_sendrecv_cmd);
 679         install_element(CONFIG_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
 680 }